38 struct xenbus_device *xen_blkbk_xenbus(struct backend_info *be)  in xen_blkbk_xenbus()  argument
40 	return be->dev;  in xen_blkbk_xenbus()
58 	struct xenbus_device *dev = blkif->be->dev;  in blkback_name()
88 	if (blkif->be->dev->state == XenbusStateConnected)  in xen_update_blkif_status()
92 	connect(blkif->be);  in xen_update_blkif_status()
93 	if (blkif->be->dev->state != XenbusStateConnected)  in xen_update_blkif_status()
98 		xenbus_dev_error(blkif->be->dev, err, "get blkback dev name");  in xen_update_blkif_status()
104 		xenbus_dev_error(blkif->be->dev, err, "block flush");  in xen_update_blkif_status()
115 			xenbus_dev_fatal(blkif->be->dev, err,  in xen_update_blkif_status()
180 	 * Because freeing back to the cache may be deferred, it is not  in xen_blkif_alloc()
205 	err = xenbus_map_ring_valloc(blkif->be->dev, gref, nr_grefs,  in xen_blkif_map()
253 	err = bind_interdomain_evtchn_to_irqhandler_lateeoi(blkif->be->dev,  in xen_blkif_map()
262 	xenbus_unmap_ring_vfree(blkif->be->dev, ring->blk_ring);  in xen_blkif_map()
301 			xenbus_unmap_ring_vfree(blkif->be->dev, ring->blk_ring);  in xen_blkif_disconnect()
349 	kfree(blkif->be->mode);  in xen_blkif_free()
350 	kfree(blkif->be);  in xen_blkif_free()
384 		struct backend_info *be = dev_get_drvdata(&dev->dev);	\
385 		struct xen_blkif *blkif = be->blkif;			\
433 		struct backend_info *be = dev_get_drvdata(&dev->dev);	\
439 VBD_SHOW(physical_device, "%x:%x\n", be->major, be->minor);
440 VBD_SHOW(mode, "%s\n", be->mode);
498 		pr_warn("xen_vbd_create: device %08x could not be opened\n",  in xen_vbd_create()
529 	struct backend_info *be = dev_get_drvdata(&dev->dev);  in xen_blkbk_remove()  local
533 	if (be->major || be->minor)  in xen_blkbk_remove()
536 	if (be->backend_watch.node) {  in xen_blkbk_remove()
537 		unregister_xenbus_watch(&be->backend_watch);  in xen_blkbk_remove()
538 		kfree(be->backend_watch.node);  in xen_blkbk_remove()
539 		be->backend_watch.node = NULL;  in xen_blkbk_remove()
544 	if (be->blkif) {  in xen_blkbk_remove()
545 		xen_blkif_disconnect(be->blkif);  in xen_blkbk_remove()
548 		xen_blkif_put(be->blkif);  in xen_blkbk_remove()
553 			      struct backend_info *be, int state)  in xen_blkbk_flush_diskcache()  argument
555 	struct xenbus_device *dev = be->dev;  in xen_blkbk_flush_diskcache()
566 static void xen_blkbk_discard(struct xenbus_transaction xbt, struct backend_info *be)  in xen_blkbk_discard()  argument
568 	struct xenbus_device *dev = be->dev;  in xen_blkbk_discard()
569 	struct xen_blkif *blkif = be->blkif;  in xen_blkbk_discard()
572 	struct block_device *bdev = file_bdev(be->blkif->vbd.bdev_file);  in xen_blkbk_discard()
609 		      struct backend_info *be, int state)  in xen_blkbk_barrier()  argument
611 	struct xenbus_device *dev = be->dev;  in xen_blkbk_barrier()
631 	struct backend_info *be = kzalloc(sizeof(struct backend_info),  in xen_blkbk_probe()  local
637 	if (!be) {  in xen_blkbk_probe()
642 	be->dev = dev;  in xen_blkbk_probe()
643 	dev_set_drvdata(&dev->dev, be);  in xen_blkbk_probe()
645 	be->blkif = xen_blkif_alloc(dev->otherend_id);  in xen_blkbk_probe()
646 	if (IS_ERR(be->blkif)) {  in xen_blkbk_probe()
647 		err = PTR_ERR(be->blkif);  in xen_blkbk_probe()
648 		be->blkif = NULL;  in xen_blkbk_probe()
668 	be->blkif->be = be;  in xen_blkbk_probe()
670 	err = xenbus_watch_pathfmt(dev, &be->backend_watch, NULL,  in xen_blkbk_probe()
704 	struct backend_info *be  in backend_changed()  local
706 	struct xenbus_device *dev = be->dev;  in backend_changed()
728 	if (be->major | be->minor) {  in backend_changed()
729 		if (be->major != major || be->minor != minor)  in backend_changed()
731 				be->major, be->minor, major, minor);  in backend_changed()
735 	be->mode = xenbus_read(XBT_NIL, dev->nodename, "mode", NULL);  in backend_changed()
736 	if (IS_ERR(be->mode)) {  in backend_changed()
737 		err = PTR_ERR(be->mode);  in backend_changed()
738 		be->mode = NULL;  in backend_changed()
752 		kfree(be->mode);  in backend_changed()
753 		be->mode = NULL;  in backend_changed()
757 	be->major = major;  in backend_changed()
758 	be->minor = minor;  in backend_changed()
760 	err = xen_vbd_create(be->blkif, handle, major, minor,  in backend_changed()
761 			     !strchr(be->mode, 'w'), cdrom);  in backend_changed()
768 			xen_vbd_free(&be->blkif->vbd);  in backend_changed()
774 		kfree(be->mode);  in backend_changed()
775 		be->mode = NULL;  in backend_changed()
776 		be->major = 0;  in backend_changed()
777 		be->minor = 0;  in backend_changed()
780 		xen_update_blkif_status(be->blkif);  in backend_changed()
790 	struct backend_info *be = dev_get_drvdata(&dev->dev);  in frontend_changed()  local
817 		err = xen_blkif_disconnect(be->blkif);  in frontend_changed()
823 		err = connect_ring(be);  in frontend_changed()
826 			 * Clean up so that memory resources can be used by  in frontend_changed()
829 			xen_blkif_disconnect(be->blkif);  in frontend_changed()
832 		xen_update_blkif_status(be->blkif);  in frontend_changed()
840 		xen_blkif_disconnect(be->blkif);  in frontend_changed()
870 	struct backend_info *be = dev_get_drvdata(&dev->dev);  in reclaim_memory()  local
872 	if (!be)  in reclaim_memory()
874 	be->blkif->buffer_squeeze_end = jiffies +  in reclaim_memory()
884 static void connect(struct backend_info *be)  in connect()  argument
888 	struct xenbus_device *dev = be->dev;  in connect()
901 	xen_blkbk_flush_diskcache(xbt, be, be->blkif->vbd.flush_support);  in connect()
903 	xen_blkbk_discard(xbt, be);  in connect()
905 	xen_blkbk_barrier(xbt, be, be->blkif->vbd.flush_support);  in connect()
908 			be->blkif->vbd.feature_gnt_persistent_parm);  in connect()
916 			    (unsigned long long)vbd_sz(&be->blkif->vbd));  in connect()
925 			    be->blkif->vbd.type |  in connect()
926 			    (be->blkif->vbd.readonly ? VDISK_READONLY : 0));  in connect()
934 					file_bdev(be->blkif->vbd.bdev_file)));  in connect()
942 					file_bdev(be->blkif->vbd.bdev_file)));  in connect()
972 	struct xenbus_device *dev = blkif->be->dev;  in read_per_ring_refs()
1057 static int connect_ring(struct backend_info *be)  in connect_ring()  argument
1059 	struct xenbus_device *dev = be->dev;  in connect_ring()
1060 	struct xen_blkif *blkif = be->blkif;  in connect_ring()